CellStyle object associated with the cell, or null if the cell doesn't have a custom style.
Remarks
If the cell doesn't have a custom style, the grid paints it using one of the built-in styles. The built-in style is selected based on the cell position and state (fixed, scrollable, highlighted, etc). To retrieve the style that will be used to paint the cell (custom or built-in) use the C1FlexGridBase.GetCellStyleDisplay method.